KBZ vacuum feed switch models including their meanings mine flameproof vacuum feed switch ore feed switch KBZ series vacuum feed switch vacuum feed switch KBZ series vacuum feed switch mine the Feed Switch ore vacuum smart with the separated burst switch uses KBZ-400 (200) / 1140 (660) mine flameproof vacuum feed switch suitable for containing a mixture of methane gas, with a risk of explosion coal mine, AC 50Hz, rated voltage of 1140V, 660V, rated current for 400,200 A neutral point directly to ground power supply network, as a master switch of the distribution, the distribution branch switch or as a motor not frequently start with. KBZ vacuum feed switch Technical parameters Rated operating voltage (V) Rated current (A) Frequency (HZ) 1140 (660) 400,200 50 overload multiples of multiples of short body form of installation closing way the 0-1Ie 1-10Ie drawer type core holder mechanical closing machinery to maintain four KBZ vacuum feed switch technical features 1. Overload, short-circuit multiples can tuning, tuning through the plug-in DIP; 2. With an aggregate, sub-gate, fault indication the kilohms Table insulation resistance; 3. Wind power gas locking function. 4. The switch has a short-circuit, overload, leakage lockout, three-phase symmetry leakage protection, selective leakage protection, leakage protection branch switch back-up protection and other protection.